Stop mechanism for looms



Jul 1 1924.

11,499,449 c. c. DORN ET Al STOP MECHANISM FOR-LOOMS Filed Juno 4, 1923 1| l8 12 m); a

Patented duly ll, T924.

l llhlaa CARL C. BORN, JOHN L. SMITH, AND WELLIAM P. LEISTER, OF WALI-IALLA, SOUTH CAROLINA.

STOP MECHANISM FOR LOOMS.

Application filed June 4,

1 0 all whom it may concern:

Be it known that we, CARL C. Donn, JOHN L. SMITH, and W ILLIAM P. Lnis'rnn, citi- Zens of the United States, residing at Walhalla, in thecounty of ()conee and State of South Carolina, have invented certain new andnseful Improvements in Stop Mechanism for Looms, of which the following is a specification.

The present invention relates to weav ng, and, more especially to a stop mechanism for looms.

In preparing warps for looms, it is common practice to mark the warp at desired lengths, these lengths being known as cuts. The cut marks are intended to notify the weaver when the desired number of yards have been woven, sothat the desired length of cloth can be removed from the loom. The warp, however, on thebeam in rear the loom, contains more cuts than are intended to be woven'into onepieceof cloth, and the operator, who often has the care of from ten to thirty looms, frequently fails to see the cut man: at the proper time on each machine as it weaves over. It therefore frequently weaves beyond the cut mark, and when this occurs it becomes necessary for. the operator torelease the cloth roll and-run it backwards until the cut mark is found. This causes a loss of time, wrinkles the cloth, and sometimes soils the cloth so that it has to be put into the seconds.

invention is to provide a device which will stopthe loom after any desired number of yards of cloth have been woven.

Another object is to provide a device of thecharacter stated which is actuated from the travis, rack or calendar gears of the loom, and which istherefore certain and definite in operation.

Another object is to provide adevic'e of the character stated which shall be automatic in operation, requiring no attention from the operator after it has been set to weave the desired length of cloth.

A further object is; to provide a device of the character stated which includes a signal, which is automatically operated to notify the operator that the desired length of cloth has been woven, that the 100m is stopped and that the cloth is ready to be removed from the loom.

A still further object is to provide a device;

- move vertically downward 1923. Serial No. 643,333.

loom, causing the driving belt to shift to its idle pulley, and thereby preventingthe loom from weavingbeyond the cut mark.

Other objects and advantages will appear from the following detailed description, taken in connectionv with the accompanying drawings, which illustrate a preferred embodiment of the invention, and in which like parts are designated by the samereference numeral throughout. The drawings are by; way of illustration only, and are not to be construed as a definition of the limits of the invention, reference being had to the accompanying claims for that purpose;

In the drawings,

Fig. 1 is a perspective view, showing so much of an ordinary loom as is necessary to a full disclosure to the present invention, and showing the present invention applied thereto and set in' posit-ion to stop the loom when the desired length of cloth has been woven.

Fig. 2 is also a perspective view, but. showing the position of, parts after the desired length of'cloth has been woven and the, loom has been; stopped in accordance with the present; invention.

shaped bottom portion 2. The trip block 1 Accordingly, one object of the present is secured in any convenient manner to the loom gearing, for example, to the travis gear, calendar gear, or rack gear, and is here shown, by way of illustration, attached to the rack gear 8 of the loom by means of a bolt 4.. The trip block 1 will therefore during operation of the loom.

The shaft 5 is attached in any usual or convenient way to any desired or standard loom stop motion. For example, it may be arranged, upon partial rotation, to shift the driving belt of the loom from a fixed to an idle pulley, not shown, as this part of the device forms no part of the present invention, and may be the usual stop. motion of a standard loom, ordinarily arranged to be actuated by the operator when the desired length of cloth has been woven.

The lever 6 is fixed to the shaft 5 in relatively non-rotatable relation. therewith, for example by the set screw 8 passing through the collar 7, forming the bottom portion of the lever 6 and through which the shaft 5 passes and is clamped within said collar 8 by the set screw 7.

The lever 6 is provided with a slot 9 near its upper end, and adj ustably arranged within the slot 9 is a bolt 10, provided with end clamping nuts: 11 for fixing it in the de sired position in said slot.

A. spring, here shown for convenience as a coiled spring 12, has one of its ends secured in any convenient manner to the bolt 10, and its other end secured to any convenient part of the loom frame, for example by clamping it to one of the bolts 13 of said frame by the nut 14:. The spring in the positionshown in Fig. 1 is distended, so that it tends to contract lengthwise, and pull the lever 6 toward the bolt 13.

Pivotally secured to the upper end of the lever 6 is the arm 15, extending substantially horizontally from the lever 6 on the same side of said lever as the spring 12. The arm 15 is curved upwardly at a convenient point, shown as about midway its length, to provide an abutment for the retaining catch 16, which is conveniently secured in fixed position on the adjacent frame of the loom, but arranged to be adjusted upwardly or downwardly on said frame, for example, bolt and slot connection thereto. The retaining catch 16 is provided on its inner side with a horizontally projecting guide strip 17 ,formed, for example, by bending down the upper edge of the catch. The guide strip 17 extends along the upper edge of the catch and terminates adjacent the notched portion 18, said notched portion 18 being of .a size to enable the arm 15 to fit and slide within it under the action of the spring 12.

The outer end of the arm 15 serves not only as a handle for setting the device in position to stop the loom, but also as a means for moving outwardly the flag or other signal 19 into position to signal the operator that the desired length of cloth has been woven. The flag or signal 19 is pivoted to the loom frame, and normally depends from said pivot in line with the arm 15.

In operation, the catch 16 is adjusted upwardly or downwardly, as desired, to vary the time it will take the trip block 1 to reach it in its downward movement with the rack gear of the loom. The arm 15 is then pushed backwardly through the slot 18 against the tension of the spring 12 until the notch 20, provided in the abutment of said arm, has moved as far back as the guide strip 17 on the catch 16. The arm 15 is then movedto the left, as seen in Fig. 1, the guide strip 17 entering the notch 20. The arm 15 is thereby retained in position.

As the trip block moves downwardly with the rack gear, its wedge shaped bottom portion will approach and eventually contact with the arm 15, wedging it outward from the frame along the guide strip 17 until it comes opposite the notch 18 in the catch 16. As the guide strip 17 terminates at this point, there is nothing to hold the arm 15 against the action of the spring, which contracts and moves the lever (3 forwardly, pushing the arm 15, forwardly through the notch 18. The lever 6, by this forward movement, partially rotates the shaft 5, to shift the driving belt to the idle pulley and thereby stop the loom without any action beingtaken by the operator. At the same time the outer end of the arm 15 pushes the flag or signal 19 outwardly and upwardly about its pivot, to notify the operator that the desired length of cloth has been woven. The position of parts at this time is clearly shown in Fig. 2. If desired, a spring ledge, or other convenient form of retaining member 21 may be provided to retain the flag or signal 19 in its signaling position independently of the pressure on it of the arm 15.

It will therefore be seen that a device has been provided which can be set, by adjusting the catch 16 upwardly or downwardly and clamping it in the desired posit-ion, to stop the loom the moment a predeterminer'l length of cloth has been woven, which can be set in advance and requires no further attention from the operator until the loom has been stopped and the desired length of cloth has been woven and is ready to be re moved, the operator being notified of these facts by the flag or signal 19 which is moved at this time into indicating position. It will also be seen that a device has been provided which will stop the loom before the cloth has been woven beyond the desired cut mark, and that all necessity of running the cloth roll backwards is eliminated, with the at tendant disadvantages of loss'of time, and

' wrinkling and soiling the cloth.

It is, of course, to be understood that various minor changes will occur to persons skilled in the art, such, for example, as actuating the trip block 1 from the travis or calendar gears instead of the rack gear, and that such changes may be made without departing from the spirit or scope of the present invention as defined by the following claims 1. In a loom a gear, means for automatically stopping said loom when a desired length of cloth has been woven, said means comprising a leverassociated with the loom stopping mechanism, a retaining member for holding said lever out of stopping position, means actuated by the gear for tripping said lever, and yieldable means associated with said lever for moving it, when tripped, to actuate said loom stop mechanism, said retaining member being adjustable, whereby it can be set so that said lever will be tripped when a predetermined length of cloth has been woven.

2. In a loom, a gear, mechanism for stopping said loom, and means for actuating said stopping mechanism when a predetermined length of cloth has been woven, said means comprising a lever associated with said stopping mechanism, an arm pivotally secured to said lever, a retaining member adapted to be engaged by said arm, means actuated by said gear for moving said arm out of engagement with said retaining member, and spring means associated with said lever for moving it to actuate said loom stopping mechanism, said retaining member being adjustable to regulate the moment of disengagement of said arm with said retaining member.

3. In a loom including a loom frame, a gear and mechanism for stopping said loom, means for actuating said stopping mechanism when a predetermined length of cloth has been woven, said means comprising a lever associated with and adapted to operate said stopping mechanism, an arm pivoted to said lever, a retaining member adapted to engage said arm for holding said lever out of loom-stopping position, a tripping member actuated by said gear and adapted to move said arm out of engagement with said retaining member, and a spring associated with said lever for moving it to actuate said stop mechanism when said tripping member moves said arm out of engagement with said retaining member.

4;. In a loom, including a gear and mechanism for stopping said loom, means for actuating said stopping mechanism when a predetermined length of cloth has been woven, said means comprising a lever associated with and adapted to actuate said stopping mechanism, a spring associated with said. lever, an arm having an abutment and pivoted to said lever, a retaining member adapted to be engaged by said abutment for holding said lever out of loom stopping position, and a wedge block actuated by said gear and adapted to contact with and move said arm out of engagement with said retaining memher, said spring adapted, upon such disengagement, to move said lever to actuate said stopping mechanism, and said retaining member being adjustable to regulate the moment of contact of said wedge block with said arm. is

In a loom, including gearing for operating said loom and mechanism for stopping said loom, means for actuating said stopping mechanism when a predetermined length of cloth has been woven, said means comprising a lever associated with and adapted to actuate said stopping mechanism, a spring associated with said lever, an arm having abutment and pivoted to said lever, a retaining member adapted to be engaged by said abutment for holding said lever out of loom stopping position, a wedge block actuated by said loom gearing and adapted to contact with and move said arm out of engagement with said retaining member, said spring adapted, upon such disengagement, to move said lever to actuate said stopping mechanism, and said retaining member being adjustable to regulate the moment of contact of said wedge block with said arm,

and a signal actuated by said arm when said spring takes effect.

6. In a loom, including a rack gear and mechanism for stopping said loom, means for automatically actuating said stopping mechanism when a predetermined length of cloth has been woven, said means comprising a lever associated with and adapted to actuate said stopping mechanism, a spring associated with said lever, an arm pivoted to said lever and provided with an abutment, a retaining member adapted to be engaged by said abutment for holding said lever out of loom stopping position, a wedge block secured to said rack gear, and adapted to be moved by said rack gear into contact with said arm and disengage it from said retaining member, said spring adapted, upon such disengagement, to move said lever to actuate said stopping mechanism, and said retain ing member being adjustable to regulate the moment said wedge block disengages said arm from said retaining member.

7. In a loom, including a rack gear and mechanism for stopping said loom, means for automatically actuating said stopping mechanism when a predetermined length of cloth has been woven, said means comprising a lever associated with and adapted to actuate said stopping mechanism, a spring associated with said lever, an arm pivoted to said lever and provided with an abutment, a retaining men'iber adapted to be engaged by said abutment for holding said lever out of loom stopping position and provided with a guiding groove for said arm, a wedge block secured to said rack gear and adapted to be moved by said rack gear into contact with said arm, disengage it from said retaining member and direct it into said guide groove, said spring adapted, upon such disengagement, to move said lever to actuate said stopping mechanism, said retaining member being adjustable to regulate the moment of said disengagen'ient, and a signal in line with said guide groove and adapt ed to be moved into indicating position by said arm when said spring takes sheet.

In testimony whereoi we aflix our signatures.

his CARL BORN.

mark JOHN L. SMITH. WILLIAM P. LEISTER. 

